August 27, 1993
12:00 AM (EDT)

News Release Number: STScI-1993-20

Core of the Globular Cluster NGC 6624

August 27, 1993: This is a comparison of pictures of the core of the globular cluster NGC 6624, as imaged with the
European Space Agency's Faint Object Camera aboard NASA's Hubble Space Telescope. This comparison
image demonstrates that Hubble's high resolution and ultraviolet sensitivity allow astronomers to
pick out the faint blue counterpart to an X-ray burster buried in the globular cluster. (An X-ray
burster is a class of unusual double star that is a source of violent bursts of X-rays.) HST
clearly distinguishes the star from others crammed together in the dense core of the cluster.